A German company create a special wooden chef knife which they see has 'self cleaning'

Creators of Knife, Lignum, say this means no soap is needed when washing, just warm water. Because, the wood used to make the Knives contains tannin which have antibacterial properties on it.

The //SKD Knife is made from 97% wood with a thin steel blade.

You can still purchase a knife  at almost the same amount you do before.